CURLEY, Robert , ed . The Britannica Guide to Inventions That Changed the Modern World ISBN 978-1-61530-020-4 . LC 2009037539. KUIPER, Kathleen , ed. The Britannica Guide to Theories and Ideas That Changed the Modern World ISBN 978-1-61530-029-7 . LC 2009048166. PLETCHER, Kenneth , ed. The Britannica Guide to Explorers and Explorations That Changed the Modern World ISBN 978-1-61530-028-0 . LC 2009037672. ea vol: 383p. (Turning Points in History Series). photos. reprods. further reading. glossary. index. CIP. Britannica Educational Apr. 2010. PLB $45. Gr 1-0 Up This well-written set, previously published in Britain, will help advanced researchers better understand events, inventions, and ideas that influenced or contributed to the modern world. The books are divided into thematic chapters that objectively cover a topic, such as communication or liberalism, from its origins to the present, so that students can see how it developed and changed through innovation or evolution in thought or knowledge. Sidebars, average-quality black-and-white illustrations and photos, and bibliographies enhance the titles. There is no set index, only volume indexes, a slight weakness. These outstanding selections will help researchers understand the evolution of science, technology, and philosophies.